Improving method of alternate selection of maize inbred line

An inbred line and corn technology, applied in the fields of plant genetic improvement, botany equipment and methods, applications, etc., can solve the problems of difficulty and lack of research, and achieve the effects of shortening the life span, improving efficiency, and accelerating the generation process

Inactive Publication Date: 2010-06-09
HENAN AGRICULTURAL UNIVERSITY
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Problems solved by technology

Maize hybrids are obtained by crossing their parents. Therefore, while screening their stress resistance, they must also take into account the selection

Method used

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  • Improving method of alternate selection of maize inbred line
  • Improving method of alternate selection of maize inbred line

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Embodiment Construction

[0035] The present invention will be described in detail below through examples, but the present invention is not limited in any way.

[0036] In the breeding process shown in Figure 1, Zheng 58 and Chang 7-2 were selected for disease resistance selection in Henan and drought resistance selection in Hainan. Taking into account their high yield under normal conditions, they were continuously selected for 6 generations. Match the hybrid combination and identify it. The specific breeding process is as follows:

[0037] In the first ten days of June of the first year, Zheng 58 and Chang 7-2 were selected for sowing in Henan, and plants with good disease resistance were selected for self-crossing, and S1 ears were obtained, and S1 ear rows and hybrid combinations were planted respectively;

[0038] In the first ten days of November of the first year, in Hainan, S1 panicle rows were planted separately, set as seedling drought treatment and normal irrigation treatment, from which pla...

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Abstract

The invention relates to an improving method of alternate selection of a maize inbred line, which belongs to the technical field of maize breeding. Zheng 58 and Chang 7-2 are taken as base materials, the ecological conditions of high-temperature, high-humidity and being prone to maize diseases of Henan in summer are taken as disease resistance selection, the ecological conditions of dry and rainless of Hainan in winter are taken as drought resistance selection, six generations are continuously selected through the alternate selection of the disease resistance and the drought resistance in two places of Henan and Hainan in one year, and the hybrid combination and the identification are simultaneously carried out, thereby enhancing the drought resistance and the disease resistance of Zheng 58 and Chang 7-2 of the maize inbred line. The stable inbred line with good stress resistance and the hybrid combination can be generally selected and bred within only three years through the south-north alternate selection, thereby greatly accelerating the generation process of the improvement of the inbred line, improving the efficiency of selecting and breeding and further achieving the purpose of fast and high-efficiently improving the maize inbred line.

Description

technical field [0001] The invention relates to the technical field of corn breeding, in particular to an improvement method for alternative selection of corn inbred lines. Background technique [0002] Corn is an important three-component crop of grain, economics and feed in my country, and has a good development prospect. Corn plants are tall and grow in high temperature and high evaporation seasons, so they require more water throughout their life. With the warming of the climate, human beings will face the serious challenge of water scarcity. Our country directly reduces the harvest of about 2.3 million tons of corn every year due to drought. Therefore, it is of great significance to screen drought-resistant maize germplasm and breed drought-resistant varieties to increase maize yield. At the same time, in recent years, corn diseases in my country have become more and more serious, resulting in reduced yield and quality of corn, posing a serious threat to production sa...

Claims

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Application Information

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IPC IPC(8): A01H1/04A01H1/02
Inventor 李潮海马俊峰王小星董朋飞齐红志
Owner HENAN AGRICULTURAL UNIVERSITY
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